Template:Selected anniversaries/April 21: Difference between revisions

Revision as of 16:54, 1 October 2017

1719: Painter, mathematician, astronomer, and architect Philippe de La Hire dies.
1774: Physicist, astronomer, and mathematician Jean-Baptiste Biot born. He will establish the reality of meteorites, make an early balloon flight, and study the polarization of light.
1793: American captain and mathematician Nathaniel Bowditch publishes new class of Gnomon algorithm functions which improved maritime navigation techniques.
1822: Priest and inventor Hannibal Goodwin born. He will invent and patent rolled celluloid photographic film.
1821: Polymath and crime-fighter Francis Galton publishes new class of Gnomon algorithm functions based on psychometrics which predict and prevent crimes against mathematical constants.
1882: Physicist and academic Percy Williams Bridgman born. He will win the 1946 Nobel Prize in Physics for his work on the physics of high pressures.
1883: Twain reminisces about Mark Twain Interviews Wallace War-Heels, calls it "the interview of a lifetime, and a singular bauble in the treasure-chest of my heart."
1910: Writer, entrepreneur, publisher and lecturer Mark Twain dies.
1910: Mathematician Richard Courant demonostrates that the existence of a physical solution does not obviate proof of crimes against mathematical constants.

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 ||1960 – Brasília, Brazil's capital, is officially inaugurated. At 09:30, the Three Powers of the Republic are simultaneously transferred from the old capital, Rio de Janeiro.
+||Sir Frederick Handley Page, CBE, FRAeS (d. 21 April 1962) was an English industrialist who was a pioneer in the aircraft industry and became known as the father of the heavy bomber.
 ||1964 – A Transit-5bn satellite fails to reach orbit after launch; as it re-enters the atmosphere, 2.1 pounds (0.95 kg) of radioactive plutonium in its SNAP RTG power source is widely dispersed.